// ##########################################################################
// #                                                                        #
// #                              CLOUDCOMPARE                              #
// #                                                                        #
// #  This program is free software; you can redistribute it and/or modify  #
// #  it under the terms of the GNU General Public License as published by  #
// #  the Free Software Foundation; version 2 or later of the License.      #
// #                                                                        #
// #  This program is distributed in the hope that it will be useful,       #
// #  but WITHOUT ANY WARRANTY; without even the implied warranty of        #
// #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the          #
// #  GNU General Public License for more details.                          #
// #                                                                        #
// #          COPYRIGHT: EDF R&D / TELECOM ParisTech (ENST-TSI)             #
// #                                                                        #
// ##########################################################################

#ifndef CC_SINGLETON_HEADER
#define CC_SINGLETON_HEADER

//! Generic singleton encapsulation structure
template <class T>
struct ccSingleton
{
	//! Default constructor
	ccSingleton()
	    : instance(nullptr)
	{
	}
	//! Destructor
	~ccSingleton()
	{
		release();
	}
	//! Releases the current instance
	inline void release()
	{
		if (instance)
		{
			delete instance;
			instance = nullptr;
		}
	}

	//! Current instance
	T* instance;
};

#endif // CC_SINGLETON_HEADER
